09-13-2011, 11:25 AM
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The swords look fine to me. Considering they are new (tank is cycling you said) they actually look very good. Expect existing leaves to likely die over the next few weeks. Provided new growth emerges from the crown, they are fine. Twice weekly Flourish is sufficient, especially with the tabs as well.
is a bit different. This is a high light plant, and as the previous member mentioned, lower leaves often rot off due to lack of light. I have no luck with this plant in my moderate lighting. Most stem plants, with a few exceptions, need higher light because they are fast growing.
On the magnesium question, there is probably magnesium in your tap water (the hardness is largely a matter of the calcium and magnesium salts in the water) plus the Flourish and tabs. It is not likely there is a magnesium deficiency.